Not a standard ISO. Convert it into BIN/CUE, you're good to go.
Speaking as a Windows user here.
This is NOT a bad .ISO file, just NOT a standard .ISO file neither. Therefore you can't mounted it as a standard .ISO file properly by a lot of image mounter. A easy solution -- get an .ISO editing software (e.g
. UltraISO) to open this .ISO file, and re-save it as other standard format (e.g
. .BIN/.CUE file, .MDF/.MDS file, .NRG file...). Then you won't have any problem of mounting or burning it.
You can even re-save it as another ISO file, but the file size would shrink from 720mb to 612mb -- seems it lost a bit chunk of hidden info/data in the process. My guess, multiple/independent soundtracks maybe? There's a lot of game or multimedia discs simply can't not be made into ISO images without audio data loss.
I mounted its .BIN/.CUE format image by Virtual CloneDrive (Elaborate Bytes) under windows 10 (did't play it). Also I burned it into a CD and played it on a 486/Win3.1
retro computer. So far without any trouble.